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Author Topic: Rounded corner goes the wrong way  (Read 1632 times)

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Rounded corner goes the wrong way
« on: August 23, 2011, 05:15:56 PM »
Love Mach3 !   Have starting using it with Cut2D and have narrowed down a problem with my first project.

The gcode is supposed to cut a rounded corner, a line and another rounded corner.  However the first rounded corner is flipped so instead of an arc which follows a clock face from 9 o'clock to 6 o'clock,  it cuts a huge arc (roughly equivalent to 2 o'clock to 3 o'clock anticlockwise).

Here's the code which is clipped from the Cut2D generated output.  Line N110 is the problem.   I have tried in both the stable release of Mach3 3.043.022 and most recent 3.043.046.   It appears to work ok in CutViewer.  

Any help appreciated!  

( Profile 1 )
( Mach2/3 Postprocessor )
N20G00G20G17G20G90G40G49G80
N30G70
N40T1M06
N50G00G43Z0.5000H1
N60S12000M03
N70G94
N80X0.0000Y0.0000F100.0
N90G00X2.0789Y1.3242Z0.2362
N100G01Z-0.1250F30.0
N110G3X2.2039Y1.1992I0.1250J0.0000F100.0
N120G01X6.8340
N130G3X6.9590Y1.3242I0.0000J0.1250
N670M09
N680M30
%

Offline ger21

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Re: Rounded corner goes the wrong way
« Reply #1 on: August 23, 2011, 06:14:53 PM »
See if this works. If it does, change the IJ mode in general config.

( Profile 1 )
( Mach2/3 Postprocessor )
N20G00G20G17G20G90G40G49G80
N25 G91.1
N30G70
N40T1M06
N50G00G43Z0.5000H1
N60S12000M03
N70G94
N80X0.0000Y0.0000F100.0
N90G00X2.0789Y1.3242Z0.2362
N100G01Z-0.1250F30.0
N110G3X2.2039Y1.1992I0.1250J0.0000F100.0
N120G01X6.8340
N130G3X6.9590Y1.3242I0.0000J0.1250
N670M09
N680M30
%
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Rounded corner goes the wrong way
« Reply #2 on: August 23, 2011, 06:51:34 PM »
Many thanks for the quick response!

1.  The additional line of N25 G91.1 caused the arc to be drawn correctly.  Yes!

2.  Setting IJ mode in the general config to incremental resolved the issue with the original file.  Perfect!

Great piece of software.  Great support.  Really appreciate it.

Back to cutting those floor registers...